Bruker Optik Gmbh

Bruker Optics Gmbh & Co. Kg

Wolfgang Heller

Uwe Renner

Achim Beyer

Stoyo Dobrianov

Sascha Faust

Ion mobility spectrometers and methods for determining an ion mobility spectrum of a sample are provided. The ion mobility spectrometers comprise a drift chamber and a cylindrical reaction chamber, wherein the drift chamber is designed to transport ions from a switching grid to an ion detector against an axial drift gas flow. The reaction chamber has a sample gas inlet adjacent to the switching grid for introducing a sample gas, a gas outlet opposite the switching grid for discharging drift gas and sample gas, and a local ionisation source arranged at the gas outlet. The sample gas inlet comprises gas inlets arranged oppositely on an inner circumference of the reaction chamber. The methods operate the ion mobility spectrometers to determine an ion mobility spectrum of a sample.

Ion mobility spectrometer and method for operating the same

Ion mobility spectrometers and methods for determining the ion mobility of a sample gas in dry air as drift gas are disclosed. The ion mobility spectrometers comprise a drift chamber, a reaction chamber, a dielectric barrier discharge ionisation source, a control unit, and a DBDI source, a pressure sensor, and a temperature sensor arranged in the chamber. A light source irradiates the DBDI source with light in a wavelength range from about 240 nm to about 480 nm. The control unit is designed to set an ignition voltage of the DBDI source and to control the light source depending on a determined pressure value and a determined temperature value. The methods control and utilize the control unit for operating the ion mobility spectrometer.

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Leipzig, Germany

Wolfgang Heller